Perhaps you should try some spelling variations:
"coder coder switch allocation problem" » "coder coder switch location problem" (Expand search), "coder coder berth allocation problem" (Expand search), "coder power switch allocation problem" (Expand search), "coder closed switch allocation problem" (Expand search), "coder code switched allocation problem" (Expand search), "coder decoder switch allocation problem" (Expand search), "code code switch allocation problem" (Expand search), "decoder codec switch allocation problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder switch allocation problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder switch allocation problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder switch allocation problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder switch allocation problem") OR ("api python python python programming"))*.